On The Brink of Madness! #68
| Series | The Sub-Mariner |
| Number | Vol. 1 #68 |
| Publisher | Marvel Comics, Marvel Comics Group* |
| Date | 1974-01 |
| Type | Comic Book, Softcover |
| Language | English |
| Colorist | George Roussos |
| Cover Artist | John Romita Sr. |
| Editor | Roy Thomas |
| Inker | Jim Mooney |
| Letterer | Artie Simek |
| Penciler | Don Heck |
| Writer | Steve Gerber |
| Genre | Superhero |
| Published in | New York |
| Pages | 32 |
| Characters | Prince Namor (Sub Mariner), Tamara, Namorita |
| Story Location | Atlantis (Destroyed), Grotto of the Ancients, Hydrobase, Zephyr Land |
| Links | https://marvel.wikia.com/wiki/Sub-Mariner_Vol_1_68 |
Added by mlopinto